STMicroelectronics M24C64-FCU6TP/TF

Overview

M24C64-FCU6TP/TF from STMicroelectronics is a 64-Kbit I²C-compatible serial EEPROM organized as 8 K × 8 bits, operating from 1.7 V to 5.5 V over –40 °C to +85 °C, supporting 1 MHz / 400 kHz / 100 kHz I²C bus modes, with 32-byte page write capability and hardware write protection via WC pin - used for nonvolatile parameter storage in industrial sensor nodes and embedded control modules.

For engineers reviewing the M24C64-FCU6TP/TF datasheet, M24C64-FCU6TP/TF pinout, M24C64-FCU6TP/TF application, or M24C64-FCU6TP/TF equivalent, key selection criteria include supply voltage range (1.7–5.5 V), I²C speed grade (1 MHz max), page size (32 B), write endurance (4M cycles), and WLCSP-5 package compatibility with space-constrained PCB layouts.

Technical Context

The device implements a standard I²C slave protocol with 7-bit device address decoding (E2/E1/E0 configurable), supports random and sequential read modes, and uses internal address auto-increment during sequential transfers. It includes dedicated logic for START/STOP detection, ACK/NACK generation, and SDA open-drain drive with external pull-up requirement.

Write control (WC) enables hardware-level memory lock: when high, all write operations (byte/page/ID page) are inhibited and data bytes receive NoAck; when low or floating, writes proceed. The identification page (32 B) is present only on M24C64-D variants - not applicable to M24C64-FCU6TP/TF.

Key Specifications

Pinout & Package

Package: WLCSP-5 (5-bump ultra-thin chip-scale package, 0.4 mm pitch, 1.1 × 0.9 mm footprint), RoHS-compliant and halogen-free (ECOPACK2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with M24C64-FCU6TP/TF, AT24C64D lacks hardware write control and BR24G64FJ adds +105 °C operation - making the ST part optimal for cost-sensitive, space-constrained designs requiring guaranteed -40 °C startup and hardware lock without thermal margin overhead.

Availability

M24C64-FCU6TP/TF is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering systems, and medical diagnostic equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant WLCSP packaging.

Supply support for M24C64-FCU6TP/TF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

M24C64 belongs to ST's serial EEPROM product line, engineered specifically for reliable, low-power, space-efficient nonvolatile storage in resource-constrained embedded systems with stringent environmental and longevity requirements.

FAQ

What is the function of the WC pin on M24C64-FCU6TP/TF?

The WC (Write Control) pin is an active-high hardware lock: when driven high, it disables all write operations (byte, page, or sequential) to the entire 64-Kbit memory array, forcing read-only behavior regardless of I²C commands. When low or floating, normal write functionality resumes. This provides fail-safe protection against unintended writes during power-up, brown-out, or firmware errors.

Does M24C64-FCU6TP/TF support the identification page feature?

No. The identification page (32-byte dedicated area with permanent lock capability) is exclusive to M24C64-D order codes. M24C64-FCU6TP/TF is based on the M24C64-F series, which omits this feature - it contains only the standard 8-Kbyte memory array with full read/write access and WC-based protection.

Can M24C64-FCU6TP/TF operate at 1.6 V?

No. While some M24C64-F variants permit 1.6 V operation under restricted conditions (e.g., limited temperature range or reduced speed), the M24C64-FCU6TP/TF datasheet specifies 1.7 V as the absolute minimum supply voltage across the full –40 °C to +85 °C operating range - no derating or conditional operation below 1.7 V is supported.

Is ECC (Error Correction Code) implemented in this part?

ECC is process-dependent and only present in devices marked with process letter 'K'. M24C64-FCU6TP/TF does not carry a 'K' process suffix in its marking or ordering information, and ST's official documentation confirms ECC is absent in standard F-series parts - error resilience relies on inherent EEPROM cell reliability and system-level CRC checks.